JP7077522B2 - Liquid container - Google Patents

Description

The present invention relates to a liquid container capable of containing a liquid such as a beverage.

The prior art is described, for example, in Patent Document 1 below. The liquid container described in the same document can be attached to and detached from the container body capable of storing the liquid and the container mouth of the container body via a screw structure, and the liquid is discharged from the container body in a state where the tightening to the container body is loosened. It is equipped with a plug that can be used.

Since such a liquid container has a simple structure with a small number of parts, it is easy to perform maintenance such as cleaning.

Jitsufuku No. 2-48366 Gazette

However, in the above-mentioned conventional liquid container, when the user performs the opening operation to discharge the liquid from the container body, if the plug body is loosened too much with respect to the container body, there is no intention of removing the plug body. The plug body sometimes came off from the container body and fell off.

In view of the above circumstances, there has been a demand for a liquid container capable of preventing the stopper from being unintentionally dropped during the opening operation.

The liquid container of the present invention is
The container body that can store liquid and
A stopper that can be attached to and detached from the container mouth of the container body via a screw structure and can discharge liquid from the container body by loosening the tightening on the container body.
A stopper structure for exerting a locking force on the plug body is provided at an intermediate point during rotation of the plug body from a deadline position where the plug body is closed to the container body to a separation position where the plug body is separated from the container body .
The stopper structure can hold the stopper in the container body at the maximum discharge position where the stopper can discharge the liquid from the container body to the maximum.
The stopper structure is provided with an engaging protrusion provided on either one of the container body and the plug body, and is provided on either the container body or the plug body to rotate the plug body with respect to the container body. An engagement stopper for engaging and disengaging the engagement protrusion is provided.
The engaging stopper is formed by rotating a plug with a first convex portion that is raised in a chevron shape, an fitting recess that is fitted into the first convex portion, and a second convex portion that is raised in a chevron shape with respect to the fitting recess. It is held side by side along the moving direction, and the engaging protrusions are fitted into the fitting recesses so that the position of the plug can be held, and the first convex portion, the fitting concave portion, and the second convex portion can be held. It is formed so that it is connected to a gentle curved surface .

According to the present invention, when the plug body is rotated in the opening direction to loosen the liquid in order to discharge the liquid from the container body, the locking force due to the stopper structure is applied to the plug body before the plug body falls off from the container body. And the user can feel the locking force as an operation feeling. Further, since a certain amount of rotation allowance (screw allowance) is secured in the opening direction from the place where the locking force acts, the user rotates the stopper body in the opening direction against the locking force. When it is made to do so, it is prevented that the plug body suddenly falls off.
As described above, according to the present invention, it is possible to construct a liquid container capable of preventing the stopper from being unintentionally dropped during the opening operation.

Further, according to the present invention , the place where the user feels an operation feeling such as a click feeling when loosening and operating the plug is the maximum discharge position where the liquid can be discharged to the maximum from the container body. Become. This makes it easy to align the plug when discharging the liquid, shortens the time from the start of the operation to loosen the plug to the completion of discharging the desired amount of liquid, and is excellent in usability. It becomes.

Further, according to the present invention , the stopper structure engages between the stopper body and the container body by engaging the engaging protrusion with the engaging stopper by utilizing the relative rotation between the container body and the stopper body. It acts as a stopping force. Therefore, with a simple structure, it is possible to suitably prevent the plug from being unintentionally dropped.

In the above configuration
In the screw structure, it is preferable that the angle range in which the plug body rotates from the deadline position to the separation position is set to 360 degrees or less.

According to this configuration, the stopper body can be separated from the container main body only by twisting the stopper body once or twice. As a result, the user can perform the disassembly work with less labor during cleaning and other maintenance. Further, since the number of turns of the screw structure is reduced, the height of the container body can be kept low, and a compact structure can be realized.

In the above configuration
It is preferable that the screw structure is composed of a plurality of threads.

According to this configuration, since the screwing distance with respect to the rotation angle is increased as compared with the single-threaded screw, the plug can be sufficiently screwed into the container body even if the number of turns of the screw structure is small. Therefore, the water blocking property between the container body and the plug body is improved, and the liquid can be reliably discharged from the container body when the plug body is loosened.

It is a side view which shows the liquid container in the state which removed the cup. It is a side view which shows the plug body. It is sectional drawing of the side view which shows the part near the container mouth of a container body. It is a top view which shows a part of a container body. It is a partial cross-sectional view of the top view which shows the part of the liquid container in the state which the plug body is in a deadline position. It is a partial cross-sectional view of the top view which shows the part of the liquid container in the state where the plug body is in the contact position. It is a partial cross-sectional view of the top view which shows the part of the liquid container in the state where the plug body is in the engaging position. It is a partial cross-sectional view of the top view which shows the part of the liquid container in the state which the plug body is in an escape position. It is a partial cross-sectional view of the top view which shows the part of the liquid container in the state which the plug body is in a separated position.

Hereinafter, embodiments that are an example of the present invention will be described with reference to the drawings.
As shown in FIG. 1 and the like, the liquid container includes a container body 1 capable of storing a liquid such as a beverage, and a plug 4 that can be attached to and detached from the container opening 2 having a circular cross section via a screw structure 3. And, a cup (not shown) that can be attached to and detached from the container body 1 and can contain a liquid is provided. The liquid container can discharge the liquid in the container body 1 without completely removing the stopper 4 from the container body 1. That is, the liquid container is of the so-called screw cap type. Further, in the liquid container, at an intermediate point where the stopper 4 is rotated from the deadline position P1 (see FIG. 5) closed to the container body 1 to the separation position P5 (see FIG. 9) separated from the container body 1. A stopper structure 5 for applying a locking force to the plug 4 is provided.

[About the container body]
As shown in FIG. 3 and the like, the container body 1 is provided with a first member 6 capable of storing a liquid, a second member 7 combined with the outside of the first member 6, and the like.

The first member 6 is preferably made of a metal such as stainless steel. The first member 6 has a double wall structure in which a bottomed tubular inner wall 8 and a bottomed tubular outer wall 9 are combined with a space between them, and has excellent heat insulating properties. The space between the inner wall 8 and the outer wall 9 (inside the double wall structure) is preferably a vacuum.

The first member 6 includes a liquid storage portion 10 capable of storing a liquid, a reduced diameter portion 11 connected to the upper side of the liquid storage portion 10 and reduced in diameter from the inner diameter of the liquid storage portion 10, and a reduced diameter portion 11. A mouth side portion 12 that is continuously provided on the upper side and has a larger diameter than the reduced diameter portion 11 is provided.

The second member 7 is preferably made of resin. The second member 7 is provided with an outer peripheral portion 13 that surrounds the outer wall 9, a shoulder portion 14 that extends above the outer peripheral portion 13 and is fitted to the mouth side portion 12 of the first member 6. ing.

On the outer surface of the shoulder portion 14, an outer screw 15 for screwing an inner screw (not shown) provided on the inner surface of a cup (not shown) detachably attached to the container body 1 is provided. ..

[About the plug]
As shown in FIG. 2, the plug 4 has a head 16 having a diameter larger than the inner diameter of the container opening 2, a main body 17 connected from the lower end of the head 16 and having a diameter smaller than the head 16, and a main body. A seal packing 18 or the like made of an elastic body such as an annular rubber fitted to the lower end of the portion 17 is provided. The head portion 16 is an operation unit for rotating the plug body 4. The head portion 16 and the main body portion 17 are made of resin and are integrally formed.

As shown in FIGS. 3 and 5 to 9, the main body 17 is provided with a pair of liquid-passing recesses 19 which are wide and vertically long recesses along the axial direction of the plug 4. The liquid passage recesses 19 are provided at locations that are 180 degrees opposite to each other with the plug 4 as the center. The plug 4 can discharge the liquid from the container body 1 through the liquid passage recess 19 in the middle of the rotation path that rotates with respect to the container body 1.

As shown in FIG. 3, the seal packing 18 is formed in a shape corresponding to the shape of the reduced diameter portion 11 of the container body 1. The seal packing 18 is made of a member that can be elastically deformed, such as rubber. By twisting and tightening the plug 4 with respect to the container body 1 in the rotation direction of the closing direction D2, the seal packing 18 is sandwiched between the main body 17 and the reduced diameter portion 11 and elastically deformed. This makes it possible to prevent the liquid from leaking from the container port 2.

The stopper 4 is rotated from the closed position P1 (see FIG. 5) with respect to the container body 1 in the opening direction D1, so that the contact position P2 (see FIG. 6) and the holding position P3 (see FIG. 6) are rotated. By rotating to the separation position P5 (see FIG. 9) separated from the container body 1 via the deviation position P4 (see FIG. 8), the container body 1 can be removed. There is.

[About screw structure]
As shown in FIGS. 2 and 3, the screw structure 3 has a first screw portion 20 formed on the container body 1 side and a first screw portion 20 formed on the plug 4 side and screwed into the first screw portion 20. The two screw portions 21 are provided. The screw structure 3 is composed of a double-threaded screw (an example of "plural number-threaded screw").

As shown in FIGS. 2 and 4, the first screw portion 20 on the container body 1 side is provided on the inner surface (inner surface of the shoulder portion 14) of the upper end portion of the container body 1. The first screw portion 20 is provided with a pair of a first screw portion 22 and a second screw portion 23 located on the spiral extension of the first screw portion 22. One first screw portion 22 and the second screw portion 23 are provided 180 degrees opposite to the center of the container body 1 with respect to the other first screw portion 22 and the second screw portion 23. Has been done. Below one of the first threaded portions 22, the other second threaded portion 23 is located. The lower part of one first threaded portion 22 is longer in the circumferential direction than the other second threaded portion 23. The first screw portion 22 and the second screw portion 23 are formed on the same spiral, but are not continuous, and between the first screw portion 22 and the second screw portion 23, In each case, a screw-less portion 24 without a screw is formed. The screw missing portions 24 are provided in pairs. Each screw missing portion 24 is provided at a position that is 180 degrees opposite to the center of the container body 1. The first screw portion 20 has an angle of about 270 degrees, which is one turn or less, from the start end of the first screw portion 22 to the end of the second screw portion 23.

As shown in FIGS. 2 and 5 to 9, the second screw portion 21 on the plug body 4 side is provided on the outer surface of the upper portion of the main body portion 17 in the plug body 4. The second screw portion 21 is provided with a pair of an upper screw portion 25 and a lower screw portion 26 formed below the upper screw portion 25. One upper screw portion 25 and the lower screw portion 26 are provided 180 degrees opposite to the center of the plug 4 with respect to the other upper screw portion 25 and the lower screw portion 26. There is. One upper threaded portion 25 is located below one lower threaded portion 26 and the other upper threaded portion 25 is located below the other lower threaded portion 26. The starting end position of one upper threaded portion 25 is substantially aligned with the starting end position of one lower threaded portion 26. A liquid passage recess 19 that has no screw and is recessed toward the center between one upper screw portion 25 and lower screw portion 26 and the other upper screw portion 25 and lower screw portion 26. Is formed. The liquid passing recesses 19 are provided in pairs. Each liquid passage recess 19 is provided at a position that is 180 degrees opposite to the center of the plug 4.

As can be understood from FIGS. 2, 3 and 5 to 9, the screw structure 3 is screwed between the upper thread portion 25 and the lower thread portion 26 on the plug body 4 side to form the container body 1. The first screw portion 22 on the side is sandwiched, and as the stopper 4 rotates in the closing direction D2, the upper screw portion 25 and the lower portion on the stopper 4 side in the first screw portion 20 on the container body 1 side. The portion sandwiched between the side screw portion 26 and the side screw portion 26 is formed in such a manner that the portion is transitioned from the first screw portion 22 to the second screw portion 23 which is an extension of the spiral of the first screw portion 22.

As shown in FIG. 7 and the like, the width of the liquid passage recess 19 on the plug body 4 side in the circumferential direction is formed to be substantially the same as the width in the circumferential direction of the screw missing portion 24 on the container body 1 side. It is preferable that the angle range of the flow path formed when the liquid passing recess 19 and the screw missing portion 24 overlap in the circumferential direction is set to about 30 to 40 degrees because a sufficient discharge amount can be secured.

As can be understood from FIG. 7 and the like, the liquid passage recess 19 and the screw-missing portion 24, which are the outflow passages on the side where the liquid is discharged when the container body 1 is tilted, are located 180 degrees opposite to the liquid passage recess. The 19 and the screw-missing portion 24 function as an intake passage for taking in outside air into the container body 1. Therefore, pulsation at the time of discharging the liquid is prevented.

As shown in FIGS. 5 to 9, in the screw structure 3, the angle range in which the plug 4 rotates from the cutoff position P1 to the separation position P5 is set to about 270 degrees, which is 360 degrees (one round) or less. .. To add an explanation, the angle range from the cutoff position P1 to the separation position P5 of the plug 4 is set to about 270 degrees, which is 360 degrees (one lap) or less.

[About stopper structure]
As shown in FIGS. 6 and 7, the stopper structure 5 makes it possible to apply a locking force to the plug 4 in the middle of the screwing path of the screw structure 3. The stopper structure 5 is provided with an engaging protrusion 27 provided on the plug body 4 side and an engaging stopper 28 provided on the container body 1 side. The engaging stopper 28 can engage and disengage the engaging projection 27 by the rotational force of the plug 4 with respect to the container body 1. The engagement stopper 28 has a mountain-shaped curved first convex portion 29 in a top view, a mountain-shaped curved second convex portion 30 in a top view, and first convex portions 29 and a second. An fitting recess 31 located between the convex portion 30 and recessed outward in the radial direction is provided.

As shown in FIGS. 2 and 6 to 9, the engaging protrusion 27 on the plug body 4 side is a portion that rises outward from the outer surface of the main body 17. That is, the outer diameter of the engaging protrusion 27 is larger than the outer diameter of the screwless portion of the main body 17. The engaging protrusion 27 is formed at a position sandwiched above and below the upper thread portion 25 and the lower thread portion 26. The engaging protrusion 27 is provided in the vicinity of the liquid passing recess 19 and in the vicinity of the ends of the upper threaded portion 25 and the lower threaded portion 26 in the opening direction D1. The engaging protrusions 27 are provided in pairs. Each engaging protrusion 27 is provided at a position 180 degrees opposite to the center of the plug 4.

As shown in FIGS. 3 to 9, the engagement stopper 28 on the container body 1 side is provided on the inner peripheral surface of the second member 7 made of resin. The inner diameters of the first convex portion 29 and the second convex portion 30 of the engaging stopper 28 are slightly larger than the outer diameter of the engaging protrusion 27 on the plug 4 side, respectively. The inner diameter of the second convex portion 30 is larger than the inner diameter of the first convex portion 29. On the other hand, the inner diameter of the fitting recess 31 in the engaging stopper 28 is the same as or larger than the outer diameter of the engaging protrusion 27 on the plug body 4 side. That is, when the plug 4 is rotated in the container opening 2 of the container body 1, the engaging protrusion 27 abuts on the first convex portion 29 and the second convex portion 30, and the engaging protrusion 27 comes into contact with the first convex portion 29. Alternatively, when the second convex portion 30 is overcome, the engaging projection 27 is held in the position of the fitting recess 31 in a dimensional relationship.

[About overtightening prevention structure]
As shown in FIG. 3 and the like, the liquid container is provided with an overtightening prevention structure 32 that prevents the stopper 4 from being overtightened with respect to the container body 1. The overtightening prevention structure 32 is provided with a notch 33 provided on the plug 4 side and a restricting piece (not shown) provided on the container body 1 side and interfering with the notch 33. The notch 33 is provided at the end of the lower threaded portion 26 in the closing direction D2. As shown in FIG. 5, when the plug body 4 is tightened to the container body 1 to set the plug body 4 to the cutoff position P1, the restricting piece on the container body 1 side is inserted into the notch 33 of the plug body 4 (not shown). Interferes with each other so that the plug 4 does not rotate in the closing direction D2 beyond the cutoff position P1. As a result, wear of the seal packing 18 and the like due to overtightening of the plug 4 can be suppressed.

[Operation when opening the plug]
As shown in FIG. 5, when the plug body 4 is tightened to the container body 1 to set the plug body 4 to the deadline position P1, as can be understood from FIGS. 2 and 3, the main body portion 17 of the plug body 4 and the plug body 4 The seal packing 18 is elastically deformed by the pressing force sandwiched between the reduced diameter portion 11 of the container body 1, and the space between the stopper 4 and the container body 1 is suitably maintained in a water-stopped state.

When the stopper 4 is rotated from the cutoff position P1 in the opening direction D1 by the first angle R1 (for example, about 80 degrees), the seal packing 18 of the stopper 4 is separated from the reduced diameter portion 11 of the container body 1. The water stop state is released.

Further, when the plug 4 is rotated from the release position where the water stop state is released to the opening direction D1 by a second angle R2 (for example, about 30 degrees; about 110 degrees from the deadline position P1), the plug 4 The liquid passage recess 19 starts to overlap with the screw missing portion 24 on the container body 1 side in the circumferential direction.

Further, when the plug 4 is rotated from the overlapping start position in the opening direction D1 by a third angle R3 (for example, about 30 degrees; about 140 degrees from the deadline position P1), the plug 4 is turned as shown in FIG. The engaging projection 27 on the body 4 side is at the contact position P2 where it abuts on the first convex portion 29. When the engaging protrusion 27 hits the first convex portion 29, the user can feel a sense of resistance. At this contact position P2, the water stop state due to the seal packing 18 is released, and the liquid passage recess 19 of the plug 4 and the screw-missing portion 24 of the container body 1 partially overlap in the circumferential direction. Even in this state, the liquid in the container body 1 can be discharged through the outflow path formed by the liquid passage recess 19 of the plug 4 and the screw-missing portion 24 on the container body 1 side.

Then, when the plug 4 is further rotated from the contact position P2 by a slight fourth angle R4 (for example, about 10 degrees; about 150 degrees from the deadline position P1) in the opening direction D1, the figure is shown. As shown in 7, the plug 4 is at the holding position P3 in which the engaging protrusion 27 gets over the first convex portion 29 and is fitted into the fitting recess 31. The holding position P3 is set to a rotation angle near the center between the cutoff position P1 and the separation position P5 in the rotation direction of the plug 4. At the holding position P3, the engaging projection 27 on the plug body 4 side is sandwiched between the first convex portion 29 and the second convex portion 30, so that the plug body 4 is held in a position with respect to the container body 1. At the holding position P3, the liquid passage recess 19 of the plug 4 and the screw-missing portion 24 of the container body 1 largely overlap in the circumferential direction, and the discharge amount is the “maximum discharge position”. That is, the stopper structure 5 is capable of holding the stopper 4 in the container body 1 at the "maximum discharge position" where the stopper 4 can discharge the liquid from the container body 1 to the maximum. .. Since this "maximum discharge position" has an angle of 180 degrees or less (half circumference) or less from the cutoff position P1, it can be set to the "maximum discharge position" by performing a twisting operation once from the cutoff position P1. ..

Then, while further applying force from the holding position P3, the plug 4 is rotated by a slight fifth angle R5 (for example, about 10 degrees; about 160 degrees from the deadline position P1) in the opening direction D1. Then, as shown in FIG. 8, the plug 4 is at the deviation position P4 where the engaging protrusion 27 has passed over the second convex portion 30. At this deviation position P4, the screwed state of the first screw portion 20 and the second screw portion 21 has not been released yet.

Then, when the plug 4 is further rotated from the deviation position P4 in the opening direction D1 by the sixth angle R6 (for example, about 100 degrees; about 270 degrees from the deadline position P1), the plug is as shown in FIG. 4 is the separation position P5. That is, when rotating from the contact position P2 or the holding position P3 to the separation position P5 in the opening direction D1, the rotation margin (screw margin) of the plug body 4 is secured to some extent. At the separation position P5, the screwed state of the first screw portion 20 and the second screw portion 21 is released, and the plug 4 is separated from the container body 1. As a result, the plug 4 can be removed from the container body 1.

On the other hand, when the stopper 4 is attached to the container body 1, the operation opposite to the above is performed. Specifically, the plug 4 is screwed into the container body 1 at the separation position P5 shown in FIG. 9, the plug 4 is rotated with respect to the container body 1 in the closing direction D2, and a force is applied. The engaging protrusion 27 is made to overcome the second convex portion 30 and the first convex portion 29 (via the deviation position P4 shown in FIG. 8, the holding position P3 shown in FIG. 7, and the contact position P2 shown in FIG. 6). Finally, tighten to the deadline position P1 shown in FIG. At this time, by providing the overtightening prevention structure 32, the stopper 4 is not overtightened to the container body 1.

As described above, since the stopper structure 5 capable of preventing the plug body 4 from falling off during the opening operation is provided between the container body 1 and the plug body 4, it is possible that the plug body 4 is unintentionally dropped off. It can be suitably prevented.

Further, since the stopper structure 5 prevents the stopper 4 from falling off, the number of turns of the screw structure 3 is set to be small, so that the stopper 4 can be removed with a small number of operations to clean the container body 1 and the stopper 4. It is possible to construct a compact liquid container that is easy to carry out and has a low height of the container body 1.

Hereinafter, other embodiments in which the present embodiment has been modified will be described. Each embodiment can be appropriately combined as long as there is no contradiction. The scope of the present invention is not limited to the contents shown in each embodiment.

(1) In the above embodiment, the case where the water stop state by the seal packing 18 is released at the contact position P2 is exemplified, but the present invention is not limited to this. For example, at the contact position P2, the water-stopped state by the seal packing 18 may be maintained.

(2) In the above embodiment, the holding position P3 on which the locking force of the stopper structure 5 acts is set to the "maximum discharge position" at which the liquid is maximally discharged from the container body 1 through the container port 2 and the liquid passage recess 19. The example set to is not limited to this. The holding position P3 may be set to a position outside the "maximum discharge position". In this case, the holding position P3 is preferably set within the discharge range in which the liquid can be discharged from the container body 1.

(3) In the above embodiment, the angle range in which the plug 4 rotates from the cutoff position P1 to the separation position P5 is set to about 270 degrees, but the present invention is not limited to this. For example, it is preferable that this angle range is set to a value of, for example, about 180 degrees to about 360 degrees or less. As a result, disassembly and maintenance can be performed with a small twisting operation of the plug body 4. On the other hand, for example, this angle range may be set to a value exceeding about 360 degrees. The holding position P3, the "maximum discharge position", and the like of the plug 4 may be set to appropriate positions according to the angle range between the cutoff position P1 and the separation position P5.

(4) In the above embodiment, the engaging stopper 28 is illustrated as being provided on the second member 7, but the present invention is not limited to this. For example, the second member 7 may be abolished, the first member 6 may be extended upward, and an engaging stopper 28 may be provided on the inner peripheral surface of the extended portion.

(5) In the above embodiment, in the stopper structure 5, the engaging protrusion 27 is provided on the plug body 4, and the engaging stopper 28 that can be engaged with and disengaged from the engaging protrusion 27 is provided on the container body 1. However, it is not limited to this. For example, the engaging protrusion 27 may be provided on the container body 1, and the engaging stopper 28 that can be engaged with and disengaged from the engaging protrusion 27 may be provided on the plug body 4. That is, the stopper structure 5 is provided with an engaging protrusion 27 provided on either one of the container body 1 and the stopper body 4, and the stopper body 4 provided on either one of the container body 1 and the stopper body 4 and with respect to the container body 1. It suffices to be provided with an engaging stopper 28 that engages and disengages the engaging projection 27 by the rotational force of the above.

(6) In the above embodiment, the one provided with the overtightening prevention structure 32 is exemplified, but the present invention is not limited to this, and such an overtightening prevention structure 32 may not be provided.

(7) In the above embodiment, the case where the inside of the double wall structure of the container body 1 is evacuated is illustrated, but the present invention is not limited to this. For example, the inside of the double wall structure of the container body 1 may not be evacuated, and a heat insulating material may be separately sandwiched between the inner wall 8 and the outer wall 9 to improve the heat insulating performance.

(8) In the above embodiment, the screw structure 3 is exemplified by a double-threaded screw, but the screw structure 3 is not limited to this. For example, the screw structure 3 may be composed of a plurality of screws having three or more threads. Further, for example, the screw structure 3 may be composed of a single-threaded screw.

1: Container body 2: Container port 3: Screw structure 4: Plug 5: Stopper structure 27: Engagement protrusion 28: Engagement stopper P1: Deadline position P3: Holding position (maximum discharge position)
P5: Separation position

Claims (3)

The container body that can store liquid and
A stopper that can be attached to and detached from the container mouth of the container body via a screw structure and can discharge liquid from the container body by loosening the tightening on the container body.
A stopper structure for exerting a locking force on the plug body is provided at an intermediate point during rotation of the plug body from a deadline position where the plug body is closed to the container body to a separation position where the plug body is separated from the container body .
The stopper structure can hold the stopper in the container body at the maximum discharge position where the stopper can discharge the liquid from the container body to the maximum.
The stopper structure is provided with an engaging protrusion provided on either one of the container body and the plug body, and is provided on either the container body or the plug body to rotate the plug body with respect to the container body. An engagement stopper for engaging and disengaging the engagement protrusion is provided.
The engaging stopper is formed by rotating a plug with a first convex portion that is raised in a chevron shape, an fitting recess that is fitted into the first convex portion, and a second convex portion that is raised in a chevron shape with respect to the fitting recess. It is held side by side along the moving direction, and the engaging protrusions are fitted into the fitting recesses so that the position of the plug can be held, and the first convex portion, the fitting concave portion, and the second convex portion can be held. A liquid container that is formed so that it is connected to a gentle curved surface . The liquid container according to claim 1 , wherein the screw structure has an angle range in which the plug body rotates from the deadline position to the separation position of 360 degrees or less. The liquid container according to claim 1 or 2 , wherein the screw structure is composed of a plurality of threads.

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